There exists a demand for radiation-safe and high-speed communication systems available to public users in the fifthgeneration (5G) communication and beyond. In this regard, visible light communication (VLC) stands out offering multi-Gigabit-per-second (Gbit/s) data transmission, energy efficiency and illumination, while being free from electromagnetic interference. Here, we report a high-speed VLC link by using a 443-nm GaN-based superluminescent diode (SLD) and bit-loading discrete-multiple-tone (DMT) modulation. Analysis of the device characteristics and modulation parameters shows a feasible bit allocation of up to 256-QAM while obtaining up to 3.8 Gbit/s data rate. These results, together with the electro-optical properties of the SLD such as being droop-free, speckle-free and high-power, make it an attractive solution for the future of public communications and smart lighting, while complementing traditional fiber-based and millimeter-wave technology.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): BAS/1/1614-01-01, GEN/1/6607-01-01, KCR/1/2081-01-01, OSR-CRG2017-3417, REP/1/2878-01-01
Acknowledgements: This work was partially supported by the National Key Research and Development Program of China (2017YFB0403603) and the NSFC project (No.61571133). This work was also supported by the King Abdullah University of Science and Technology (KAUST) funding BAS/1/1614-01-01, GEN/1/6607-01-01, REP/1/2878-01-01; KAUST equipment funding KCR/1/2081-01-01. This publication is also based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-CRG2017-3417. TKN and BSO gratefully acknowledge funding from the King Abdulaziz City for Science and Technology (KACST) Grant no. R2-FP-008.